4320% is the change from 15 to 663
Calculation steps:
[( 663 - 15 ) ÷ 15] x 100 = 4320%
Formula
Percentage change = [(663 - 15) / 15] x 100
Subtract the new number by the original number
663 - 15 = 648
648 ÷ 15 = 43.2
43.2 x 100 = 4320%
Example